Fahrenheit to Celsius Converter
Convert Fahrenheit (°F) to Celsius (°C). Results update as you type, with a conversion table and the formula below.
1 °F =
-17.2222 °C
°F to °C conversion table
| °F | °C |
|---|---|
| 1 | -17.2222 |
| 2 | -16.6667 |
| 3 | -16.1111 |
| 4 | -15.5556 |
| 5 | -15 |
| 6 | -14.4444 |
| 7 | -13.8889 |
| 8 | -13.3333 |
| 9 | -12.7778 |
| 10 | -12.2222 |
| 15 | -9.4444 |
| °F | °C |
|---|---|
| 20 | -6.6667 |
| 25 | -3.8889 |
| 30 | -1.1111 |
| 40 | 4.4444 |
| 50 | 10 |
| 60 | 15.5556 |
| 70 | 21.1111 |
| 80 | 26.6667 |
| 90 | 32.2222 |
| 100 | 37.7778 |
How to use
- Type the °F value to convert.
- The result appears instantly in °C; the swap button reverses direction.
- For common values, check the conversion table below.
Frequently asked questions
How many °C is 1 °F?+
Temperature isn't proportional — it follows the formula °C = (°F − 32) × 5/9. Example: 77 °F → (77 − 32) × 5/9 = 25 °C.
How accurate are the results?+
The math uses internationally standardized definitions; only the display is rounded to significant digits. Accurate enough for school, work and daily life.
How do I convert °C back to °F?+
Hit the swap arrows in the middle of the converter above — the direction flips and your value is kept.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
The formula
°C = (°F − 32) × 5/9. Example: 77 °F → (77 − 32) × 5/9 = 25 °C.
Celsius and Fahrenheit place zero differently (water freezes at 0 °C = 32 °F), so the conversion needs both a multiply and an offset. The converter above applies this exact formula.
When is this conversion needed?
Useful for foreign weather forecasts, oven temperatures in recipes, US travel and science material.